I'm an oldest-school Castlevania player, but dubious of all videogame adaptations (people used to complain about Uwe Boll, as if Bloodrayne was any worse than Mortal Kombat or Street Fighter). And so far it hasn't changed my opinion: The dialogue is painful, like a bad translation from Japanese text boxes, with a little goat-fucking humor. The plot's told in jump-cut scenes. The art's nice, but has minimal animation until the fight scenes; those are rendered in gory detail.
But the plot gets moving in episode 2, and I like the squalid medieval atmosphere. The Speakers are poorly explained, but giving any backstory for magic-users is a huge improvement. By the episode 4 (end of this season), Trevor Belmont's whininess has mostly stopped, and he starts being the whip-cracking hero we know, just enough to face a classic Castlevania sub-boss.
★★★★☆ which could have been higher if the start wasn't so slow and awkward.